Single tandem disk harrow



Nov. '3', 1931. .J. R. BARKER SINGLE TANDEM DISK HARROW F'iled March 2,, 1929 4 Sheets-Sheet 1 7 3, 1931- J. R. BARKER 1,830,218

SINGLE TANDEM DISK HARRow Filed March 2, 1929 4 Sheets-Sheet 2 L v I Nov. 1931. ,1, BARKER 1 1,830,218

SINGLE TANDEM DISK HARROW File'd March 2, 1929 4 Sheets-Sheet a Nov; 3, 1931. IR, 8mm 1,830,218

I S I NGLE TANDEM DISK HARROW Filed March 2, 1929 4 snags-sheet 4 atented Nov. 3, 1931 UhlITED STATES PATENT OFFICE JOSEPH R. BARKER, OF IALLBROOK, CALII ORNIA, ASSIGNOB TO B. V. CURRY, TRUSTEE SDIGLE TANDEM DISK HABROW This invetnion relates to disk implements,

and is more particularly related to a disk implement ofthe type commonly referred to as a single tandem disk harrow, as for example as is disclosed in the patents issued to Heber F. Towner, Nos. 1,627,355 and 1,627,356, and

which include two gangs of'disks only and connected together in tandem relation,-the disks of each gang being of the concavo-convex type and having their concave sides in the forward gang turned toward one side or end of the implement, and the disks of the opposed gang having their concave sides all turned toward the opposite end or side of the implement.

While disks of this type have gone into extensive use, there has been one serious difliculty in their operation which has greatlv retarded their commercial adaptation and has greatly complicated their actual use under operating conditions. This difliculty prior to my invention has been to cause the .mplements to turn in either direction freely lnless resorting to backing of the implement aither to move the gangs out of pitch orworking angle and then turning the implenent, or turning the implement in a manner cause the gangs to move out of angle or mt of operating position and then-backing he implement to again place the two gangs n a normal operating or working position. )isk implements of this type have usually veen constructed so'that when the two gangs re angled the left ends of the respective .angs remain in substantially the same relaionship or are in some instances moved loser together while the right ends of the espective gangs move apart; in other words, .ey have been connected together customrily so that their pivotal connection is tted to the left side of the implement. With iis, particular construction, the difliculty as vbeen in-turning such implement to the ght or around the open ends of the gangs, ecause-when so turning there is an agravated tendency of the disks at these open ldS to dig into the ground and resist turnlg. In some cases the pivotal connection atweenthe gangs has been located on the ght side of the implement, and in such case the same to turn in either the same tendenc for the disks to dig into the ground has een in evidence when attempting to turn this implement toward the left. The side of the disk at which the piv-.

otal connection between the gangs is located, whether the pivotal point be actually located atthe side or at some other point near the center, the gangs on being angled move together, and the open side of the implement around which the difliculty to turn is exhibited is the side of the implement where the angs move apart as the implement is angle to a working position. a

.It is, therefore, an object of this invention to provide a single tandem disk harrow which is so constructed that it may be turned freely in either direction as desired or required and may be returned to the operating osition with the desired pitch in the disks 0 the respective gangs without backing the motive power or the implement.

Another object of this invention is to provide a disk harrow of the single tandem which includes means permitting the turning of the gangs of disks around the closed ends of the gangs and means for forcing the opened ends of the gangs together while continuing the operation or movement of the implement to permit the im lement to be turned around the opened ends 0 the gangs and for returning the gangs of disks to pitch or working position while the implement is without necessitating the backing or moving, the stopping of the implement to make adjustments.

Another object of this invention is to providea single tandem disk implement which includes means forturning the disk implement in either direction while the same is traveling ahead and for moving the disks back into pitch or working positi n while traveling ahead, and means for ad usting the pitch a or working position of the disks of each of said gangs 7 p Another object of this invention is to provide a single tandem disk harrow which includes means for automatically manipulating the gangs of the disks to (position to permit is the side of the implement where irection while the g implement is traveling ahead, and means for ad usting the implement in a manner to cause the "same to travel in offset position in relation to the tractor or other motive power 5 without imposing upon the tractor or other motivepower undue side-draft. Another object of this invention is to provide a single tandem disk harrow including two gangs only connected in tandem rela- 10 tion, me'ans for connecting the gangs together to cause the disks of the rear gang to cut centers between the furrows cut by the disks of the forward gang, to maintain the. gangs vertically as well as horizontally rigid under operative conditions, and means for angling the disks apart at their opposed ends while driving the, implement ahead to permit the same to be freely turned in either direction 2 and for returning the gangs'of disks tonormal operating or angled position'while the implement is still traveling ahead.

Other objects of this invention it is believed will be apparent from the following detailed description of a preferred embodiment thereof as illustrated in the accompanying drawings.

In the drawings:

Fig. lis a top plan view of a disk harrow embodying this invention, illustrating the same innon-o'perating or traveling position.

Fig. 2 is'a top plan view of the disk implement illustrated in Fig. 1 illustrating the same as in angled or workingposition and as in position. to be drawn in; offset relation to a tractor or motive power and also in position to permit the implement to be turned to the left around the ends of the gangs-which are normally brought together when the im-- 40 plement is in working or angled position.

Fig. 3 is a similar top plan view'ofa disk implement embodying this invention,'illustrating the same as manipulated by the tractive force; drawing the'implement ahead to turnedfreely-around the normally opened ends of said gangs. i

Fig. 4 is a side elevation of the disk implement as illustratedin Fig. 1.

Fig. 5 'is an enlarged fragmental view of the adjustable latch mechanism embodied in this invention.

Fig'; 6 is a top-plan view of a modified form Fig. 8 is a side elevation of' the disk imple-' ment illustrated in Fig. 7.;

Fig. 9 is a top plan view of a modified I in a manner to maintaincontrol of the gangs bring the gangs together at their normal-1y opened ends and permit the implement to be form of disk implement embodied in this vention.

Fig. 10 is a fragmented elevation on an enlarged scale of the angling bar adjusting means embodied in the modified form of this invention shown in Fig. 9.

- Fig. 11 is a fragmental line 11 11 of Fig. 9. Fig. 12 is a sectional view taken substan View taken on the tially on the line 1212 of Fig. 9.

In the modified form of this invention illustrated in Figs. 1 to 5, inclusive, there is illustrated a forward gang of disks 1 and a rearward gang of disks'2. Each of the gangs of disks includes a plurality of disks?) as mounted in theforward gang and a gang of disks 4; as mounted in the rearward gang. In each casethe disks-3 or, the disks 4 are mounted upon a gang-rod 5 or 6. Each of the gang rods 5 and 6 is supported in bearings 7 or 8 secured to frames 9 or 10. This portion of the construction is now common to the art. It is asdisclosed in the patents issued to Heber F. Towner', ticular manner of construction-of the gangs forming no part of thisinvention'. The gangs of disks may be formed in any desired manner well understood in the art. In the forward gang v1 the disks 3 are mounted on, the

gang rod 5 so that their concave sides are turned toward one end of the gang. In the rearward gang 2 concavo-convex disks 4 are mounted on the gang rod 6 with-their concave sides turned toward the end of the, gang 2 opposed from that toward which 'the concave sides'of the forward gang are mounted.

aforesaid. the par- Means are provided for pivotally ,connecting the gangs 1 and 2 together, which means are in this modification illustrated as includingapair of spaced plates 11 which are se cured to the frame 9 ofthe forward gang 1 in a manner to form 'a bifurcated bracket.

two plates 11 forming the bifurcated bracket and is held in position by means of a vertically extending pivot pin 13. This pivot pin '13 formsa center around which the gangs 1 gang2. The single plate 12 fits between the p A single plate 12 is secured to the rearward rotated to the non-working but right turned position illustrated in Fig. 3 I Draft means are provided the implement composed of the gangs 1 and 2 to a tractor'or other draft means and are. in

this modification illustrated as including a for connecting bar 14which'may be termed the offset bar and which is pivotally connected at a'pin 15. to one end of the frame. 9 of the forward gantrand at its opposite end is pivotallv connected at apln 16 to the fulcrumed draft turn lever 17 The offset bar 14 is a divided bar formed of twoportion's 18 and 19 which are adjustably connected-together so as tobe longitu ible means. The means herein illustrate nclude a plurality of spaced holes formed a each of the bars 18 and 19 and through ny spaced pair of which holes bolts 21 may e passed to form in any particular adjusted osition a longitudinally fixed and rigid offet bar. The manner in which the disk imdement embodied in this invention is offset io'vably connected together in a manner to.

|ermit the gangs to be adjusted to angled osition, to force the gangs into angled orrorking position and/ or force the gangs out f angled or working position to bring the nds of the gangs together which are norially open when in working position to-periit the implement to be turned around these pened ends or to the right as shown in Fig. This member of the hitch includes the fulruined draft turnfmember 17 which'is piv tally connected at 16 to the offset bar 14 and xtends beyond the pivotal connection 16 to rovide an arm 22 which is connected with the lraft clevis or yoke bar of the tractor or therdraft'nieans. The fulcrum point 23 of he fulcrumed draft turn member 17 is pivtally connected to the hitch bar 24 by a pivot in. The hitch bar 24 is adj-ustably connected ia second hitch bar 25 by any suitable means which will permit relative elongation of the iember composed of the hitch bars 24 and 5 but will permit the fixing of the combined ength of the elements 24 and 25 in any deired adjusted position. ar '25 is pivotally connected to the frame 9 f the forward gang at a pivot 26. The

ianner ofconnecting the elements of the itgh to the frame 9 of the forward gang my be as desired or as is well understood 1 the art, such, for example, as by-using an djustable connection to vary the vertical oint-s of connection of the members of this itch with the forward frame as is specifically lustrated in the patent issued to Herber F. owner No. 1, 7,355; I I

The particula means herein illustrated for djustably connecting the elements 24 and 5 together includes the ratchet bar 27 which ;pivotally connected bya pin 28 to a bracket 9 secured at a point near the end of the itch bar 24. The bracket 29 extends downrardly from the hitch bar 24 to provide a lide through which the hitch bar 25 extends. .he'bracket 29 carries a roller on a pin 30 elow the hitch-bar 25 so that thehitch bar ill slide freely through the bracket 29. Se ured to the forward end of the hitch bar 25 The second hitch is a bracket 31. The bracket 31 carries a ratchet pin32 which is adapted to be engaged by any one of the teeth 33 to the ratchet bar 27 depending upon the particular adjustment in which it is desired to place the gangs 1 and 2. Secured to the upper end of the bracket 31 is a stop pin 34 which prevents displacement vertically upward of the ratchet bar 27. Secured to the forward end of the ratchet bar 27 is a flexible connecting member or rope 35 which extends forwardly from the implement in a position of access to the operator of the tractor or other draft means which is used to forwardly.

Means are provided for moving the gangs 1 and 2 into angled position with any particupull the implement Mr or desired adjustment of the offset bar 14 i I and hitch bars 24 and 25 by the force imparted through the fulcrumed draft turn lever 17 or for moving the gangs to parallel position from such angled position or for forcibly bringing the gangs together at the ends of the gangs which are normally spaced apart under working conditions to permit the implement to be turned around these normally spaced apart ends, which means are herein illustrated as of the following construction: Secured to the arm 36 of the fulcrumed draft turn lever 17 at a pivot pin 37,

is a link 38. The link 38 is at its opposite end pivotally connected byfa pivot 39 to a fulcrum arm 40. The fulcrum arm 40 is pivotally connected by a pivot 41 to the end 42 of the hitch bar 24. At its opposite end the fulcrum arm 40 is connected at a pivot 43 to a force-actuated bar 44'which extends rearwardly and is connected to the frame 10 of the rearward gang at a point spaced from the pivot 13 by a pivot 45. The pivot 45 is located from the pivot 13 toward the side of the implement at which the ends of the gangs 1 and 2 are brought together when,

moved to working or angled position with the disks adjusted to a certain working pitch.

In operation the disk harrow as illustrated in Figs. 1 to 5', inclusive, functionsas follows:

\Vith the parts adjusted to the position indicated in Fig. 1 w'hich is the traveling position or the position in which the gangs are set to travel along without the disks 3 or 4 working, and when it is desired to adjust the gangs 1 and 2 to a working osition as shown in Fig. 2, the operator pul s on the flexible rope, 35. This pull on the rope 35 releases the ratchet bar 27 from the pin 32, permitting relative elongation of the hitch bar forme of the members 24 and 25. This relative elongation permitted by release of the ratchet bar 27. and the driving head of the tractor means operates through the fulcrumed draft turn lever 17. the link 38. fulcrum bar 40 and Iforce-actuated bar 44 to move the gangs 1 and 2 from the position illustrated in Fig. 1 to the working or angled position illustrated a position offset from the tractor or draft means. In this position when it is desired to turn to the left or ardund the ends of the gangs which are normally brought together in operating position, the operator merely turns the tractor or draft means to the left and the gangs are brought together at the left end in a manner which will permit turning in this direction. Upon completingthe turn the operator merely drives the tractor or draft means aheadand the gangs are still in the proper pitch position as determined by the adjustment in the length of the hitch member formed of the elements 24 and 25. When it is desired to turn the implement to the right or around the open ends of the gangs the operator merely turns the tractor or draft means to the right. Upon driving ahead to make the right turn the gangs 1 and 2 are automatically forced from the position indicated in Fig. 2 to the position indicated in Fig. 3. This automatic operation is accomplished by the rotation of the fulcrumed draft turn lever 17 on the fulcrum point 23.

This fulcruming of the lever 17 moves thearm 36 to cause the pin 37 to travel. rearwardly. The pin 37 traveling rearwardly. forces the lever 38 rearwardly, causing the fulcrum bar 40 to pivot on the pivot 41, moving the force-actuated bar 44 rearwardly, forcing the rear gang 2 at the point of connection by the pivot 45 away from the forward gang 1. The force also applied by the fulcru-ming of the lever 17 also imparts a force throu h the draft bars 24 and 25 tending. to pull the left end ofthe forward gang 1 forwardly toseparate the gangs 1 and 2 at the left end. This forcing of the gangs 1 and 2 apart at the left end automatically brings the gangs 1 and 2 together at the right end as they pivot around the pivot 13. Gn continued turnin and as the right ends of the two gangs are rought together the disk implement travels freely as turning to the right without causing undue digging in of the disks 3 and 4 of the respective gangs. After the operator has completed the right turn, he merely continues to drive the tractor or draftmeans ahead, turning the same straight, and as the pulling force is applied to the end of the member 22 of the fulcrumed draft turn lever 17, the reverse action from that just described is followed through, the elements 17, 36, 38, 40 and 44 operating to bring the gangs 1 and 2 back from the position illustrated in Fig. 3 to that illustrated in Fig. 2 or back from the position permitting a ree right turn to the angled or working position. The entire operation of making the changes of the positions of the gangs from that illustrated in Fig. '1 to Fig. 2 ant from Fig. 2 to Fig. 3'is accomplished whilr the implement was being driven ahead, with out stopping or backing of the implement o: tractor. In the modification shown in Figs 1 to 5, inclusive there is provided a sto means formed as an extension of the fulcrun lever 17 and as illustrated at 46, which hold: the fulcrum lever 17 from being rotated around its fulcrum point 23 beyond a straigh' line position in relation to the hitch membe1 formed of elements 24 and 25 in order to limi the operation of the hitch and turning means in this direction. 'The stop member 46 engages the side or edge 47 of the hitch mem ber 24.

In the modified form of this invention illustrated in Fig. 6 like parts are designated with like numerals with the addition of ar exponent a. In this modification the structure is substantially similar with tlk exception that the fulcrum point 13c through which the gangs 1a and 2-6 arr connected together is located at the ends 01 the gangs 1a and 2a at a point 011i3Sld of the ends of the disks 3a and 4-a a: specifically illustrated in the Towner patents aforesaid. The manner of connectior by the pivot 13a is formed through spaced plates 11a which are secured to the frame a of the rear gang forming a bifurcated bracket and a single plate'12a which is secured to the frame 9aof the forward gang. The same form of offset bar 140 is provided as in the modification of this invention illustrated in Figs. 1 to 5, inclusive. A slight re-arrangement of the levers for effecting the movement of the gangs 1-@ and 2a to positions to make a right turn, to angled or working position, or to parallel or non-working position, is required by the movement of the pin 13a to this position.

The particular arrangement'of theseiparts in this modification is that the fulcrumed draft turn lever 17a is connected to the hitch bar 14a at a pin 16@ in the same manner as in the modification shown in Figs. 1 to 5, inclusive, and the lever '17-a is connected at its fulcrum point 23a to the member 24a in the same manner. The arm 36-a is connected to a lever 38a in the same manner at a pivot 37 a. The fulcrum member 40- 1z is, however, connected at its outer end preferably by the same pivot 26-11 by which the hitch bar ais connected to the frame of the forward gang 1a. The opposite end of the fulcrum bar a is connected at the pin 39-a to the lever 38-a. At an intermediate point the force-actuated bar 44 a is connected by the pin 43-a to the fulcrum lever 40--'a. At its opposite end the force-actuated bar 44a is connected at the pivot of 45a to the frame 10-a of the rear gang and at a point moved inwardly from the pin 13--a rather than outwardly as p 2-6 together is substantiall 'illustrated in the previously described modification of this invention.

The members 24-a and 25-a areadjustably longitudinally connected together by means of a ratchet mechanism the same as illustrated in the previously described modification. In operation the two modifications are the same, with the exception that in the modification shown in Fig. 6 it requires a shortening of the free end of the members 24-a and 25-a to move the same into an led or pitch position, while in the first described modification an elongation of the hitch bar formed of the members 24 and 25 is required. Thus it requires a backing of the tractor in order to first adjust the gangs l-a and 2-a into the desired angled or working position in this second modification, and when driving ahead and when the ratchet which connccts the members 24 and 25 is released the gangs l-a and 2-a may be pulled out of angled position by the draft force.

In the third modified form of this invention illustrated in Fig. 7, like parts are designated with like numerals with the addition of an exponent b.

In this instance the frames 9-6 and 10-6 I of the gangs 1-6 and 2-6 are connected together by a cross-reach formed of a 'pair of rigidly connected bars 11-6 and 12-6. The opposed ends of the bars 11-6 and 12-6 are afiixed to the respective frames by means of bolts 50-6. In order to provide a pivot with this construction, a pair of curved radius bars 51-6 and 52-6 are provided which curve away from each other and are connected to the frames of the respective gangs at their ends. This manner of pivotally connecting the gangs 1-6 and by using a centrally located pivot 13 as illustrated in Figs. 1 to 3, inclusive. Thehitch provided includes an offset bar 146 which is the same as the offset bar 14 or 14-41. A fulcrumed draftturn lever 17-6-is pivotally connected to the offset bar 14-6 in the same manner at apivot 16-6. The fulcrumed draft turn lever 17-6 is connected with the draft 'bar 24-6 at a pivot 23-6. The rear end of the hitch bar 24-6 is connected to a floating hitch arm 53-6 at a pivot 26-6. The floating hitch member 53-6 is connected to the frame 9-6 of the forward gang 1-6 at a pivot 54-6. The offset bar 14-6 is pivotally connected to this floating hitch member 53-6 at a pivot -6. The floating hitch bar 53-6 is adjustably connected at its opposite end to the opposite corner of the frame 9-6 of the forward gang 1-6 by means of a ratchet including a ratchet bar 27-6 which is pivotally connected to the frame as indicated at 28-6 and fits within a bracket 31-6 secured to the floating hitch bar 53-6. The brachet 31-6 carries a ratchet pin 32-6 adapted to be engaged by any one pivotally the same as ly ri 'd and for this of-an angle bracket 56-6 secured to the under face of the floating bar 53-6. This manner of adjustment permits a relative elongation or contraction lon 'tudinall of the combined hitch members firmed of the member 24-6 and the ratchet bar 27-6 to effect adjustment of the pitch or working angle of the gangs 1-6 and 2-6.

The arm 36-6 of the fulcrumed lever 17-6 is connected with a link 38-6 at a pivot 37-6. The rear end of this lever is connected at a ivot 39-6 at an intermediate point of the fiilcrum' bar 40-6. The fulcrum bar 40-6 is pivotally connected at a pin 41-6 to the floating arm 53-6. The opposite end of the fulcrum arm 40-6 is connected with the force-actuated bar 44-6 at a pivot 43-6. The opposed end of the force-actuated bar- 44-6 is connected to the frame of thev rear gang at a pivot in 45-6.

In operation this third modifie form of this invention is entirel similar to the operation of the first modi cation of this invention previously described.

In the modified form of this invention illustrated in Figs. 9, 10, 11 and 12, similar parts have .been. desi ated with similar numerals with the fiddltlOIl of an exponent c. In this modification the gangs 1-0 and 2-0 are connected together by means .of the pivot 13-0 through which practically the entire draft force'from the front gang to the rear gang passes in normal operation of the implement. The connection formed by the .pivot 13-0 is intended to be verticalu'rpose is formed of a bi rcated bracket ormed of a air of spaced plates 11-0 which are secured frame of the forward gang 1-0 by bolts.

A single plate 12-0 fits within the bifurcated bracket formed of the plates 11-0 and this plate 12-0 is adjustably secured to the frame of the rear gang 2-0 by bolts -0 which are adapted tofit within any desired pair of holes 51-0 to adjust the rear gang laterally in relation to the forward gang. By adjusting the rearward gang laterally in relation to the forward gang, the disks 4-0 of the rearward gang may be caused to cut in any desired position in relation to the discs 3-0 of the forward and the gangs may be adjustedwhen desire so that the disks of the rearward ang accurately cut'centers between the dis s of the forward gang. The connection thus pro vided between the forward. gan and the rearward gang is also substantia y vertically rigid, holding the two gangs from relative tipping action and tending to cause the disks to the gee soil to the same degree. The vertically rigid :connection'thus provided causes the weights of the respective gangs to aid each other in connected through a clevis 54-0 with the' frame of the forward gang 1-0 at one end at its opposite end is pivotally connected at the pin 16-0 with theright-turn fulcrum lever 17-0. The an ling bar 25-0 is connected to the frame the forward gang through a clevis 55-0 at one end and at its opposlte end is pivotally connected at the pin 23-0 at a right-angle extension 56-0 of the draft 25 member 25-0 to'an extension 57-0 of the right-turn draft lever 17-0. The link 38-0 -is connected at the pivot 37-0 with the arm a 36-0 of the fulcrum right-tum lever 17-0. The link 38-0 is at its opposite end connected with the ,pin 39-0 with the multiplier lever 40-0. The multiplier lever 40-0 is connected by means of a clevis 58-0 to the frame of the forward gang 1-0. The opposite endof the multiplier arm 40-0 is K connected with the arm 44-0 at. a pivot 43-0. The other end ofthe arm 44-0 is c nnected through a clevis 45-0 with the frame of the rear gang 2-0. Pivotally mounted on the pin 23-0 is a rod 59-0 which carries a bifurcated bracket 60-0 in which the ratchet pin 32-0 is mounted. The extension 57-0 of the right-turn fulcrum lever 17-0 carriesv a similar bifurcated bracket 29-0 upon which the ratchet bar 27-0 is pivoted at the pin 28-0. .The arm 59-0 slides through the bracket 29-0 and theextension 57-0 extends through the bifurcated bracket 60-0. The supporting slide 63-0 is secured to the arm 59-0 to' provide a bearing slide for supporting the rear end of the arm 59-0 and slides across the upper surface of the arm 25-0. 4

A stop 61-0 is 'provided which is secured I to the arm 59-0 in positionto engage the.-

edge of the arm 25-0 and prevent rotation beyond an overlying position of the arm 59-0 over the draft bar 25-0 when the implement is turned toward the'left and the gangs are ing said lever with the angle control bar and open to an angled'or working position.

right-turn fulcrum draft lever to any type of tractor, a hammer strap 62-0 is pivotally holding the disks of the gangs to the proper .In order to provide means for securing the ".51. detail described three modified forms of my present invention, it-is to be understood that my inventionmay take other and diverse I side of the implement, said connecting means being substantially rigid in a vertical plane when the implement is horizontal and laterally adjustable to vary the cutting relation of disks of the forward and rearward gang, a hitch securedto the forward gang, including an adjustable offset bar, an adjustable angle control means, locking and releasing means-for said angle-control means, means for controlling said locking and releasing means,-=a fulcrumed' draft turn lever, means for connecting said lever with the angling means and the offset bar, means for connecting said lever to a draft means, and means operatively connecting said lever with the rear gang so that as said lever is turned the gangs will, be angled apart or together.

2. In a single tandem disk implement, the combination of a forward gang of disks, a rearward gang of disks, means forconnecting said gangs in tandem relation to permit the ends of the gangs to be angled apart at one side of the implement, said connecting means being substantially rigid in a vertical plane .when the implement 1s horizontal, a hitch secured to the forward gang, including an adjustable offset bar, an adjustable angle control means, locking and releasing means for saidangle control means, means for controlling said locking. and releasing means, a

fulcrum draft turn lever, means for connecting the latter said lever with the angling means and the offset bar, means for connecting said lever to a draft means, and means operatively connecting said leverwith the rear gang so'that as said lever is turned the gangs will be angled apart or together.

3. In a single tandem disk implement, the combination of a forward gang of disks, a rearward gang of disks, means connecting said gangs in tandem relation to permit the ends of the gangs to be angled apart at one side of the implement, a hitch secured to the forward gang including an adjustable ofiset bar, an adjustable angle control bar, a fulcrum draft turn lever, and means for connectthe offset bar, means for connecting said lever to a draft means, and means operatively congang of disks anda means for connecting combination of a forward rearward gang of disks, said gangs in tandem relation to permit the ends of said gangs to be angled apart at one side of the implement,a hitch secured to the forward gang including adjustable offset means, adjustable angle control means, a fulcrum draft turn lever, means for connecting said lever with the angle control means, means for connecting said lever with the offset means, means for connecting said lever to a draft means, a multiplier lever, means for connecting the multiplier lever with the fulcrum draft'turn lever, and means for connectng the multiplier lever with the rear gang of disks so that as the implement is moved ahead the gangs will be brought together at the side of the implement where the gangs are angled apart to a working position to permit the implement to be turned around this side of the implement aslthe lever is turned, and for returning the gangs to angled working position when the implement is pulled forward after completing the turn. t

5. In a single tandem disk implement, the combination of a forward gang of disks. a rearward gang of disks, means connecting said gangs in tandem relation to permit-the ends of said gangs to be angled apart at one side of the implement to working position, a hitch secured to the forward gang including an adjustable angle control bar, a fulcrum draft turn lever, means for connecting said lever with the adjustable angle control bar, means for connecting said lever to a draft means, means operatively connecting said lever with the rear gang so that as said lever is turned the gangs will be angled together at the side of the implement where they are normally angled apart to a working position as the implement is moved ahead and; turned around said side of the implement and so that .as the implement is moved straight ahead the gangs will again be angled apart toworking position.

6. In a single tandem disk implement, the combination of a forward gang of disks,,a rearward gang of disks, means connecting said gangs in tandem relation to permit the ends of the gangs to be angled apart at one side of theimplement to working position, and adjustable angle control bar pivotally secured to the forward gang, latch means permitting longitudinal adjustment of the angle control bar to re late the working angle of'said gangs, a lcrum draft .turn

.lever, means connecting the fulcrum draft lever with the angle control bar, means connecting said fulcrum draft turn lever with the rear. gang, and means for connecting said lever to a draft means so that as said lever is turned as the implement is moved forwardly' the gangs will be angled apart or together..

7. In a single tandem disk implement, the combination of a forward gang of disks, a

from the I side of the rearward gang of disks, means connecting said gangs intandem relation to permit the ends of the gangs to be angled apart at one side of the implement to working position, a hitch secured to the forward gang including an adjustable offset bar, an adjustable angle control bar, a fulcrum draft turn lever, means for connecting said turn lever with the angle control bar, means for connecting said draft turn lever with the offset bar, means for connecting said draft turn lever to a draft means, a multiplier ing the multiplier bar on said forward gang, means for connecting the multiplier bar with the fulcrum draft turn lever, and means operatively connecting the multiplier lever with the rear gang of disksfat a point spaced connecting means between said gangs.

8. In a single tandem disk implement, the combination of a forward gang of disks, a rearward gang of disks, means connecting said gangs in tandem relation to permit the ends of the gangs to be angled apart at one side of the implement to a working position, a hitch secured to the forward gang including anadjustable offset bar, an adjustable angle control bar, a fulcrum draft turn lever, means for pivotally connecting said lever with the angle control bar, means for pivotally connecting said lever to the offset bar at a point spaced from the pivotal connection of said lever with the angle control bar, means for connecting said lever to a draft means, and means operatively connecting said lever with the rear gang so that as said lever is turned and the implement moved forwardly the gangs will be brought together or angled apart from and to working position.

9. In a single tandem disk implement, the combination of a forward gang of disks, a rearward gang of disks, means connecting said gangs in tandem relation to permit the ends of the gangs to be angled apart at one implement to working position, a pair of hitch bars secured to the forward gang, a fulcrum draft turn lever, means for connecting said lever with each of said hitch bars at spaced points, means for connecting said lever to a draft means, and means operatively connecting said lever with the rear gang. v

10. In a single tandem disk implement, the combination of a forward gang of disks, a rearward gang of disks, a single draft pivot holding said gangs in tandem relation to permit the ends of the gangs to be angled apart at one side of the implement to a working position, a pair of hitch bars pivotally secured to the forward gang at spaced points, a fulcrum draft turn lever, means for connecting said lever with one of said hitch bars, means for connecting said lever at its fulcrumed point with the other of said hitch bars, means bar, means for pivotally mount for connecting said lever at a point outside of l v n I the ends said hitch bars with a'draft means, and means operatively connecting-said lever with'the rear gang of disks.

- 11. In a-singletandem disk implement, the combination of a forward gang of disks, a ct crumed point with ,the'othe of said hitch bars, means forconnecting said lever at a point outside of said hitch barswith a draft means, a multiplier bar, mounting the multiplier bar om the :front gang, means for connecting the multiplier bar with the fulcrum draft turn lever, and

means for connecting the multipli rvbar with i r gang of disks. a T I 12. Ina single tandem disk implement, the

combination of a forward gang of v disks, &

rearward gang of disks, means'foi' connecting said. gangs in tandem relation to permit of the gangs to be angled apart at one side of the implement to a working pos1- tion, a pair of draft bars secured in spaced relation to the forward gang, a fulcrum draft turnlever, means pivotally securing the fulcrum draft turn to one of said draft bars, means for pivotally securing one arm of the fulcrum draft turn lever-to the other draft bar as a pomt spaced from the fulcrumed point, means for connecting one arm of the fulcrum draft turn lever to a draft means, and meansor operatively connecting the other arm of the fulcrum draft turn leverwith the rear gang of v disks so that as said lever is turned and'the implement'is be angled apart or together to and from working position.

rearward gang of disks, means'for connectto one of said draft bars, means for pivotally securing one arm ofthe fulcrum draft turn lever to theotherdraftbarat a point spaced from the fulcrumed point, means for connecting one arm of the fulcrum draft turn lever to a draft-means, a multiplier bar, means for pivotally mounting the multiplier baron the front gang, means for connecting the multi- .plie-r bar with the fulcrum draft turn lever,

means for pivotally;

lever at its fulcrumed pointmoved forwardly the gangs will 13.. In a single tandem disk implement, the combination of a forw'ard'gang of disks, a

ln said gangs in tandem relationto permit P the ends of the gangs to be angled apart at. one side of the implement to a working poand'means for connecting the'multiplierban with the rear gang of disks. 14:; In a single tandem disk im lemqnathe" combination of a forward gang of disks, a

rearward gang of disks,- means connecting said angs of disks in tandem relation to per-. mit t e ends of said gangs to be angledapart at one side ;of the implement, a hitch secured to the forward gang including an adjustable offset bar, an adjustable angle control means, 1

locking and releasing means for said angle control means, a fulcrum draft turn le-ver,,

means for connecting said lever with the an- 1 gle'control means, means for connecting said lever with the offset bar, means for connectingsaidleve'r to a draft means, and substantially rigid means operatively connecting said lever with the'rear gang so that as said lever is turned the gangs will be angled apart or together from and to wo rking position as the implement is moved forwardly.

. 15. In a single tandem disk implement, the combination. of a forward gang of concaveconvex'\ disks, a rearward gang of concaveconvex disks, the disks of the forward'gang being mounted in said gang with their concave sides all turned toward one endof the forward gang, the disks of the rearward'gang being mounted in the rearward gang with their concavesides turned toward the opposite end of the rearward gang, a single draft pivot connecting said gangs together in tandem relation and so arranged that substantially all of the draft force is transmitted from the forward gang tothe rearward gang, and said pivot permitting the gangs to be angled apart at one side of the implement to -working position, a hitchsecured to the forward gang including an adjustable offset bar, an adjustable angle control bar, locking and releasing means for said adjustable anglle control bar, means for controlling said ing and releasin means, a fulcrum draft turn lever, means or connecting the said turn lever with the angle control bar atthe fulcrumed point of said turn lever, means for connecting the turn lever with the offset bar at a point removed from the fulcrumed oint, means for connecting one arm of the fulcrum draft turn lever with a draft means, and means for operatively connecting the other arm of the fulcrum draft turn lever with'the'rear gang so that as said lever is turned and'the implement moved forwardly the gangs will be angled apart-or together to or fromworking position. I

16. In a single tandem disk implement, the

- combination of a forward'gang of concaveconvex disks, a rearward gang of concaveconvex disks, 'the disks of the forward gang means 9 site end of the rearward gang, a single draft pivot connecting said gangs together in tandem relation and through which substantial- 17 all of the draft force is transmitted from the forward gang to the rearward ang, and

said pivot permitting the gangs to e angled apart at one side of the implement to working position, a hitch secured to the forward 4 vgang including an adjustable ofi'set bar, an

adjustable angle control bar, locking and releasing means for said adjustable angle control bar, means for controlling said locking and releasing means, a fulcrum draft turn lever, means for connecting the said turn lever'with the angle control bar at the fulcrumed point of said turn lever, means for connecting the turn lever with the ofiset bar at a point removed from the fulcrumed point, means for connecting one arm of the fulcrum draft turn lever with a draft means, a multiplier lever, means for pivotally supporting the multiplier lever, means for connecting the multiplier lever with the other arm of the fulcrum draft turn lever, and means for connecting the multiplier lever with the rear gang.

Signed at Santa Ana, California, this 24th day of January, 1929. JOSEPH R. BARKER. 

